Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 1 - Graphs - 1.3 Lines - 1.3 Assess Your Understanding - Page 31: 69

Answer

The equation of the line is: $y=0.5x+1.5$

Work Step by Step

The slope of the line can be found as the product of the slopes of two perpendicular linesis $-1$. Therefore the product of the slope of the line $2x+y=2$ and the one we are trying to find equals to $-1$. The given line can be rewritten as: $y=-2x+2$, in this form the coefficient of $x$ gives the slope. Hence, the slope of this line is $m_1=-2$. This means that the slope ($m_2)$ of the line we are after is: $-2\times m_2=-1$ $m_2=0.5$, this is the slope of the line we are trying to find. If we have the slope and a point on the graph $(-3,0)$ we can use the point-slope formula to find the equation of the line: $y-y_1=m(x-x_1)$ $y-0=0.5(x-(-3))$ $y=0.5(x+3)$ $y=0.5x+1.5$
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